MCQ 11
Which part of the plant is primarily involved in photosynthesis?
A) Roots
B) Stems
C) Leaves
D) Flowers
Answer: C) Leaves
Explanation: Leaves are the main sites of photosynthesis, containing chlorophyll that captures sunlight.
MCQ 12
Which of the following is a modified stem?
A) Potato
B) Carrot
C) Onion
D) Radish
Answer: A) Potato
Explanation: The potato is a modified stem known as a tuber, which stores nutrients.
MCQ 13
What type of plant tissue provides support and strength to plants?
A) Parenchyma
B) Sclerenchyma
C) Collenchyma
D) Meristematic
Answer: B) Sclerenchyma
Explanation: Sclerenchyma is a supportive tissue that has thick, lignified cell walls, providing strength to plants.
MCQ 14
Which of the following is a characteristic of monocotyledonous plants?
A) Two cotyledons
B) Parallel venation
C) Taproot system
D) Broad leaves
Answer: B) Parallel venation
Explanation: Monocots typically have parallel venation in their leaves, unlike dicots, which usually have reticulate venation.
MCQ 15
What is the main function of the sepals in a flower?
A) Attract pollinators
B) Protect the flower bud
C) Produce nectar
D) Support the petals
Answer: B) Protect the flower bud
Explanation: Sepals protect the developing flower bud before it opens.
MCQ 16
Which type of root is primarily found in grass?
A) Taproot
B) Fibrous root
C) Adventitious root
D) Aerial root
Answer: B) Fibrous root
Explanation: Grasses typically have a fibrous root system, where many small roots grow from the base of the stem.
MCQ 17
In flowering plants, which structure typically contains ovules?
A) Stamen
B) Carpel
C) Petal
D) Sepal
Answer: B) Carpel
Explanation: The carpel contains the ovary, which houses the ovules that develop into seeds after fertilization.
MCQ 18
What type of inflorescence is characterized by flowers blooming from the bottom to the top?
A) Spike
B) Raceme
C) Umbel
D) Head
Answer: B) Raceme
Explanation: In a raceme, flowers bloom sequentially from the bottom upward along the central axis.
MCQ 19
Which plant organ is primarily responsible for the absorption of water and nutrients?
A) Leaves
B) Stems
C) Roots
D) Flowers
Answer: C) Roots
Explanation: Roots are the main organs responsible for the absorption of water and nutrients from the soil.
MCQ 20
Which part of the flower is responsible for attracting pollinators?
A) Stigma
B) Petals
C) Anther
D) Sepals
Answer: B) Petals
Explanation: Petals are often brightly colored and fragrant, attracting pollinators to the flower.
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